package ru.designtop.voditel;

import android.app.AlertDialog;
import android.app.Service;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.os.IBinder;
import android.provider.Settings;
import android.util.Log;

public class LocationTracker extends Service implements LocationListener{
	
	private final Context mContext;
    // flag for GPS status
    boolean isGPSEnabled = false;
 
    // flag for network status
    boolean isNetworkEnabled = false;
 
    boolean canGetLocation = false;
 
    Location location; // location
    double latitude; // latitude
    double longitude; // longitude
 
    // The minimum distance to change Updates in meters
    private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 10; // 10 meters
 
    // The minimum time between updates in milliseconds
    private static final long MIN_TIME_BW_UPDATES = 1000 * 60 * 1; // 1 minute
 
    // Declaring a Location Manager
    protected LocationManager locationManager;
 
    public LocationTracker(Context context) {
        this.mContext = context;
        getLocation();
    }     
        public Location getLocation() {
            try {
                locationManager = (LocationManager) mContext
                        .getSystemService(LOCATION_SERVICE);
     
                // getting GPS status
                isGPSEnabled = locationManager
                        .isProviderEnabled(LocationManager.GPS_PROVIDER);
     
                // getting network status
                isNetworkEnabled = locationManager
                        .isProviderEnabled(LocationManager.NETWORK_PROVIDER);
     
                if (!isGPSEnabled && !isNetworkEnabled) {
                    // no network provider is enabled
                } else {
                    this.canGetLocation = true;
                    // First get location from Network Provider
                    if (isNetworkEnabled) {
                        locationManager.requestLocationUpdates(
                                LocationManager.NETWORK_PROVIDER,
                                MIN_TIME_BW_UPDATES,
                                MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
                        Log.d("Network", "Network");
                        if (locationManager != null) {
                            location = locationManager
                                    .getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
                            if (location != null) {
                                latitude = location.getLatitude();
                                longitude = location.getLongitude();
                            }
                        }
                    }
                    // if GPS Enabled get lat/long using GPS Services
                    if (isGPSEnabled) {
                        if (location == null) {
                            locationManager.requestLocationUpdates(
                                    LocationManager.GPS_PROVIDER,
                                    MIN_TIME_BW_UPDATES,
                                    MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
                            Log.d("GPS Enabled", "GPS Enabled");
                            if (locationManager != null) {
                                location = locationManager
                                        .getLastKnownLocation(LocationManager.GPS_PROVIDER);
                                if (location != null) {
                                    latitude = location.getLatitude();
                                    longitude = location.getLongitude();
                                }
                            }
                        }
                    }
                }
     
            } catch (Exception e) {
                e.printStackTrace();
            }
     
            return location;
        }

        /**
         * Function to check if best network provider
         * @return boolean
         * */
        public boolean canGetLocation() {
            return this.canGetLocation;
        }
        /**
         * Function to get latitude
         * */
        public double getLatitude(){
            if(location != null){
                latitude = location.getLatitude();
            }
             
            // return latitude
            return latitude;
        }
         
        /**
         * Function to get longitude
         * */
        public double getLongitude(){
            if(location != null){
                longitude = location.getLongitude();
            }
             
            // return longitude
            return longitude;
        }
         
        /**
         * Function to show settings alert dialog
         * */
        public void showSettingsAlert(){
            AlertDialog.Builder alertDialog = new AlertDialog.Builder(mContext);
          
            // Setting Dialog Title
            alertDialog.setTitle("GPS is settings");
      
            // Setting Dialog Message
            alertDialog.setMessage("GPS is not enabled. Do you want to go to settings menu?");
      
            // Setting Icon to Dialog
            //alertDialog.setIcon(R.drawable.delete);
      
            // On pressing Settings button
            alertDialog.setPositiveButton("Settings", new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog,int which) {
                    Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
                    mContext.startActivity(intent);
                }
            });
      
            // on pressing cancel button
            alertDialog.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int which) {
                dialog.cancel();
                }
            });
      
            // Showing Alert Message
            alertDialog.show();
        }
        
        /**
         * Stop using GPS listener
         * Calling this function will stop using GPS in your app
         * */
        public void stopUsingGPS(){
            if(locationManager != null){
                locationManager.removeUpdates(LocationTracker.this);
            }       
        }
        
	@Override
	public void onLocationChanged(Location arg0) {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void onProviderDisabled(String arg0) {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void onProviderEnabled(String arg0) {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void onStatusChanged(String arg0, int arg1, Bundle arg2) {
		// TODO Auto-generated method stub
		
	}

	@Override
	public IBinder onBind(Intent arg0) {
		// TODO Auto-generated method stub
		return null;
	}

}
